// JavaScript Document
(function (doc, win) {
    var docEl = doc.documentElement,
        resizeEvt = "orientationchange" in window ? "orientationchange" : "resize",
        recalc = function () {
            var clientWidth = docEl.clientWidth; //获取设备尺寸
            if (!clientWidth) return;
            if (clientWidth >= 750) {
                //设计稿宽度
                docEl.style.fontSize = "100px";
            } else {
                docEl.style.fontSize = 100 * (clientWidth / 750) + "px";
            }
        };
    if (!doc.addEventListener) return;
    win.addEventListener(resizeEvt, recalc, false); //绑定事件
    doc.addEventListener("DOMContentLoaded", recalc, false);
})(document, window);
